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Water Supply

Hi...I am installing a sprinkler system in my yard and have a question with the water supply. I have installed 1" PVC main and zone pipes in the ground and are running approx 5 long range sprayers per zone and approx 4 zones. My house is on a slab (no basement) and I have a 1" feed line from the street to where it comes through the house foundation. The black 1" pipe from the street sticks up approx 6 inches out of the slab then is reduced to a 3/4 copper pipe where it comes through the drywall and into the water meter in my utility room. My question is, can I tap the 3/4 copper after the meter to fee my 1" PVC sprinkler main? It is only reduced to 3/4 copper for about 1-2 feet from the 1" line from the street. Do you think it will be a problem?

What you should be doing is to simply make your connection, right after the water meter, and bring the copper outside to your PVB, and then do a flow and pressure test. Only at that point can you know exactly what your water supply is.

Easy - no indoor PVC in Jersey (and yes, you'll see it all over, but codes have changed) - If you had a really long run of pipe indoors, you would use the beige-colored CPVC pipe and fittings. For less than 20 feet, stay all copper. In any event, a pro doesn't run plastic pipe through the exterior wall.